<template>
  <div id="roles" v-loading="loading">
    <!-- 面包导航 -->
    <el-breadcrumb separator="/" style="padding-left:10px;padding-bottom:10px;font-size:12px;">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>系统管理</el-breadcrumb-item>
      <el-breadcrumb-item>菜单管理</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片主体 -->
    <el-card class="box-card">
      <div class="block">
        <!-- 节点过滤 -->
        <el-row>
          <el-col :span="16">
            <div class="grid-content bg-purple">
              <el-input placeholder="输入关键字进行过滤" v-model="filterText" clearable></el-input>
            </div>
          </el-col>
          <el-col :span="2">
            <div class="grid-content bg-purple-light">
              <el-button
                type="primary"
                icon="el-icon-plus"
                style="margin-left:20px;"
                @click="openParentAdd"
              >父级</el-button>
            </div>
          </el-col>
           <el-col :span="2">
                <el-button
                type="danger"
                style="margin-left:20px;"
                icon="el-icon-download"
               @click="downExcel"
              >导出</el-button>
           </el-col>
    
        </el-row>

        <p>菜单权限树</p>
        <el-tree
          :data="data"
          accordion
          :auto-expand-parent="false"
          node-key="id"
          show-checkbox
          :default-expanded-keys="open"
          :expand-on-click-node="false"
          :render-content="renderContent"
          :props="defaultProps"
          highlight-current
          :filter-node-method="filterNode"
          ref="tree"
        ></el-tree>
      </div>
    </el-card>
    <!-- 节点新增弹出框 -->
    <el-dialog :title="addTitle" :visible.sync="addDialogVisible" @close="addClose" width="50%">
      <span>
        <el-form
          size="mini"
          ref="addFormRef"
          :model="addForm"
          label-width="80px"
          :rules="addFormRules"
        >
          <el-form-item label="节点名称" prop="menuName">
            <el-input v-model="addForm.menuName"></el-input>
          </el-form-item>
          <el-form-item label="URL">
            <el-input v-model="addForm.url"></el-input>
          </el-form-item>
          <el-form-item label="权限编码">
            <el-input v-model="addForm.perms"></el-input>
          </el-form-item>
          <el-form-item label="图标">
            <el-input v-model="addForm.icon"></el-input>
          </el-form-item>
          <el-form-item label="是否可用" prop="disabled">
            <template>
              <el-radio v-model="addForm.disabled" label="false">可用</el-radio>
              <el-radio v-model="addForm.disabled" label="true">禁用</el-radio>
            </template>
          </el-form-item>
          <el-form-item label="是否展开" prop="open">
            <template>
              <el-radio v-model="addForm.open" label="1">展开</el-radio>
              <el-radio v-model="addForm.open" label="0">关闭</el-radio>
            </template>
          </el-form-item>
          <el-form-item label="排序" prop="orderNum">
            <el-input-number v-model="addForm.orderNum" :min="1" :max="10" label="描述文字"></el-input-number>
          </el-form-item>
          <el-form-item label="类型" prop="type">
            <template>
              <el-radio v-model="addForm.type" label="0">菜单</el-radio>
              <el-radio v-model="addForm.type" label="1">按钮</el-radio>
            </template>
          </el-form-item>
        </el-form>
      </span>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addNode" :loading="btnLoading" :disabled="btnDisabled">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑节点弹出框 -->
    <el-dialog :title="editTitle" :visible.sync="editlogVisible" width="50%" @close="editClose">
      <span>
        <el-form
          size="mini"
          ref="editFormRef"
          :model="editForm"
          label-width="80px"
          :rules="addFormRules"
        >
          <el-form-item label="节点名称" prop="menuName">
            <el-input v-model="editForm.menuName"></el-input>
          </el-form-item>
          <el-form-item label="URL">
            <el-input v-model="editForm.url"></el-input>
          </el-form-item>
          <el-form-item label="权限编码">
            <el-input v-model="editForm.perms"></el-input>
          </el-form-item>
          <el-form-item label="图标">
            <el-input v-model="editForm.icon"></el-input>
          </el-form-item>
          <el-form-item label="是否可用" prop="available">
            <template>
              <el-radio v-model="editForm.disabled" :label="false">可用</el-radio>
              <el-radio v-model="editForm.disabled" :label="true">禁用</el-radio>
            </template>
          </el-form-item>
          <el-form-item label="是否展开" prop="open">
            <template>
              <el-radio v-model="editForm.open" :label="1">展开</el-radio>
              <el-radio v-model="editForm.open" :label="0">关闭</el-radio>
            </template>
          </el-form-item>
          <el-form-item label="排序" prop="orderNum">
            <el-input-number v-model="editForm.orderNum" :min="1" :max="10" label="描述文字"></el-input-number>
          </el-form-item>
          <el-form-item label="类型" prop="type">
            <template>
              <el-radio v-model="editForm.type" :label="0">菜单</el-radio>
              <el-radio v-model="editForm.type" :label="1">按钮</el-radio>
            </template>
          </el-form-item>
        </el-form>
      </span>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editlogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="updateMenu"
          :loading="btnLoading"
          :disabled="btnDisabled"
        >确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
import axios from "axios";
let id = 1000;

export default {
  watch: {
    filterText(val) {
      this.$refs.tree.filter(val);
    }
  },

  data() {
    const data = [];

    return {
      btnLoading: false,
      btnDisabled: false,
      loading: true,
      open: [], //展开节点
      filterText: "", //节点过滤文本
      addDialogVisible: false, //新增节点弹出框
      editlogVisible: false, //编辑节点弹出框
      addTitle: "",
      editTitle: "",
      addForm: {
        parentId: "",
        menuName: "",
        url: "",
        type: "",
        orderNum: "",
        disabled: "",
        open: "",
        perms: ""
      }, //添加请求表单数据
      editForm: {}, //编辑节点表单数据
      addFormRules: {
        menuName: [
          { required: true, message: "节点名称不能为空", trigger: "blur" },
          { min: 3, max: 10, message: "长度在 3 到 10 个字符", trigger: "blur" }
        ],
        disabled: [
          { required: true, message: "节点状态不能为空", trigger: "blur" }
        ],

        orderNum: [
          { required: true, message: "排序不能为空", trigger: "blur" }
        ],
        type: [{ required: true, message: "类型不能为空", trigger: "blur" }],
        open: [{ required: true, message: "是否展开不能为空", trigger: "blur" }]
      }, //添加表单验证规则
      pNode: {}, //父节点
      data: JSON.parse(JSON.stringify(data)),
      data: JSON.parse(JSON.stringify(data)),
      defaultProps: {
        children: "children",
        label: "menuName"
      }
    };
  },
  created() {
    this.getMenuTree();
    setTimeout(() => {
      this.loading = false;
    }, 500);
  },
  methods: {

    /**
     * 加载菜单表格
     */
    downExcel() {
      var $this = this;
      const res = axios.request({
          url: "/menu/excel",
          method: "post",
          responseType: "blob"
        })
        .then(res => {
          if(res.headers['content-type']==='application/json'){
            return $this.$message.error("Subject does not have permission [menu:export]");
          }
          const data = res.data;
          let url = window.URL.createObjectURL(data); // 将二进制文件转化为可访问的url
          var a = document.createElement("a");
          document.body.appendChild(a);
          a.href = url;
          a.download = "菜单列表.xls";
          a.click();
          window.URL.revokeObjectURL(url);
        });
    },


    //更新菜单
    async updateMenu() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) {
          return;
        } else {
          this.btnLoading = true;
          this.btnDisabled = true;
          const { data: res } = await this.$http.put(
            "menu/update/" + this.editForm.id,
            this.editForm
          );
          if (res.code == 200) {
            this.$message({
              title: "成功",
              message: "节点信息更新",
              type: "success"
            });
            this.editForm = {};
            this.editlogVisible = false;
            this.btnLoading = false;
            this.btnDisabled = false;
            this.getMenuTree();
          } else {
            return this.$message.error(res.msg);
          }
        }
      });
    },
    //点击编辑节点
    async edit(data) {
      this.editTitle = "编辑：【" + data.menuName + "】";
      const { data: res } = await this.$http.get("menu/edit/" + data.id);
      if (res.code == 200) {
        this.editForm = res.data;
        this.editlogVisible = true;
      } else {
        return this.$message.error("节点编辑失败:" + res.msg);
      }
    },
    //过滤节点
    filterNode(value, data) {
      if (!value) return true;
      return data.menuName.indexOf(value) !== -1;
    },
    //关闭添加
    addClose() {
      this.$refs.addFormRef.clearValidate();
      this.addForm = {};
    },
    editClose() {
      this.$refs.editFormRef.clearValidate();
      this.editForm = {};
    },
    //加载菜单树
    async getMenuTree() {
      const { data: res } = await this.$http.get("menu/tree");
      if (res.code == 200) {
        this.data = res.data.tree;
        this.open = res.data.open;
      }
    },
    //打开添加框
    openAdd(data) {
      this.addTitle = "添加节点 ：当前【" + data.menuName + "】";
      this.addDialogVisible = true;
      this.addForm.parentId = data.id;
      this.pNode = data;
    },
    //添加最高父级节点
    openParentAdd(data) {
      this.addTitle = "添加第一父级";
      this.addDialogVisible = true;
      this.addForm.parentId = 0;
    },
    //点击删除按钮
    async delNode(node, data) {
      var res = await this.$confirm(
        "此操作将永久删除该节点, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(() => {
        this.$message({
          type: "info",
          message: "已取消删除"
        });
      });
      if (res == "confirm") {
        console.log(node);
        const { data: res } = await this.$http.delete(
          "menu/delete/" + node.data.id
        );
        if (res.code == 200) {
          this.$message.success("节点删除成功");
          this.getMenuTree();
        } else {
          this.$message.error("节点删除失败:" + res.msg);
        }
      }
    },
    //发送添加节点请求
    async addNode() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return;
        } else {
          this.btnLoading = true;
          this.btnDisabled = true;
          const { data: res } = await this.$http.post("menu/add", this.addForm);
          if (res.code == 200) {
            this.$message.success("节点添加成功");
            this.addDialogVisible = false;
            this.btnLoading = false;
            this.btnDisabled = false;
            this.getMenuTree();
          } else {
            this.$message.error("节点添加失败");
          }
        }
      });
    },
    //前端添加节点
    append(data, newChild) {
      console.log(newChild);
      //   var newChild = { id: 1231, label: "qqqqq", children: [] };
      if (!data.children) {
        this.$set(data, "children", []);
      }
      data.children.push(newChild);
    },

    remove(node, data) {
      const parent = node.parent;
      const children = parent.data.children || parent.data;
      const index = children.findIndex(d => d.id === data.id);
      children.splice(index, 1);
    },

    renderContent(h, { node, data, store }) {
      return (
        <span class="custom-tree-node">
          <span>
            <i class={data.icon}></i>&nbsp;&nbsp;&nbsp;{node.label}
            {node.data.type == 0 ? "" : "（权限）"}
          </span>
          <span>
            <el-button
              size="mini"
              type="text"
              on-click={() => {
                this.edit(data);
                return false;
              }}
            >
              <i class="el-icon-edit"></i>&nbsp;编辑
            </el-button>
            <el-button
              size="mini"
              type="text"
              on-click={() => {
                this.openAdd(data);
              }}
            >
              <i class="el-icon-plus"></i>&nbsp;增加
            </el-button>

            <el-button
              size="mini"
              type="text"
              on-click={() => this.delNode(node, data)}
            >
              <i class="el-icon-delete"></i>&nbsp;删除
            </el-button>
          </span>
        </span>
      );
    }
  }
};
</script>

<style>
.custom-tree-node {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
  padding-right: 8px;
}
</style>